Automatic telephone system



Oct. 9,1923.

w. 'w. OWEN AUTOMATIC I TELEPHONE SYSTEM Original Fi le may so, 1918 2 Sheets-S Oct. 9 1923.

w. w. OWEN AUTOMATIC TELEPHONE SYSTEM 2 Sheets-Sheet 2 Original Filed May '3 Patented e; 9, 923. 1

. V V 1 IBe i WTI 'YLLI AMWVALTER GWEN, 01? gm; PARKT-ILLIN IsgAsslemon w AUTOMA'HC I'IELECQ' TRIG' COMPANY,1 0E5 cmeeee, fnpmqxsle CORPORATIQNJOEILLINOIS;

oi v gy, .a Citizen, 'of tlie United States" "of America; and aliesid'ent 0f Qak PaJIkQCQ k 5 Go ul ity ahdlsltate Illiiiois,hafie ihyehtd certain new and usef ul] lmpioyenientslrrin 1 .l Tin 10 gpqtgmallig telepfllbile, 'sy'st eiliiilji @whicli c011 I 11y y iph ,tches,

li enerq l m m dim mu'wm V r fencgunteredbyhef1isepfagtgmgticsystems," Y Z espefiia-llyiri largerpitiesfls;the;1a;ge:num=

' Z too great an amount ft ime fcif lief Operaswitches requife less operalhons, yet the of installation aii djl the epe'r atiliss rq liid z si ;re t ylneal o l e e tj ir lt 'irs y ils al ng" w l Ref in; half; thelinumber" of; dig ofiaczdled number While ill? "the same acreatesw a; material decrease in the u t f Switching,

in the arl fas it; overcbmesl thetflve greaitesi;

- device: i rsllc ystem. "a to "PEQY l im st nd rd yp 0t switching mechanismlf 1 .l-Q I thedre wings Figs l" afidj2 sihdwalli nelinei (F -21 pi'ovi e rw h 1 11, as l sishoflliiil Figs-[3," d h ving zl'" v "when I l is. of z'tll Well jkndwn dmmb bet t efy i typ bffsu atidli fil li e S icli fQisu Qf3 8 lfkI QW Pfiy i1'in e itch Wh SQ iiper 'nd "he; l p i trunk. llhe; last rusedi The line I swit'ghe hive ac 's Memb r bf fe rsl 1D wm r ioffthe we liki wflK ifih E "bye f selector is gbntpelledbyi fn,

weasel ten respectively The second row otfinger holes have the'same relation as the inner row to the opera-ting mechanismof the dial except that they are designated by the -let- L tters A K respectively, and, 'in addition, when a finger isinserted into "anygoneot the finger holes and the-dial is re;

tated aroundto the finger stop, thesprings 12 and 3 will'be operated momentarily to ground oneside of the line circuit as shown in Fig. 1 atthe'substation A, to cause adif- 'ferential relay in the selector or connector to pull up'and switch the linecircuit' to'the second set of Wipers. The outer row of fin ger holes also" bear the same relation to'tl 2 operating mechamsmas the inner row of 1 holes "except that theseholes are designated [by the lettersLl/V;respectively, and 'con-' trolla nother pair ofsprings l and 5, which,

,asshown' at" substationA, include a high resistance in the line-circuittoallow a mar- "gin'al relay the selector; or connector to fall back; whereby fthe line circuit isswitched to' thethird set of wipers. 7 It will be seen therefore, that no matter which dialor row i or; finger holes-is used nom' ore than ten "impulses is transmitted,

scriber calls-'2, tw'o iinpulsesf will i-bedeliv- That is, if a subered in the u'sual n anner; if B is dialed, thenfltwo i-mpulses will also be sent-except 7 a that springs 2"and3 will be closed momeni tarlly just before the impulses are sent; if

r M is dialed, two, iinpulseswillialso be sent except'that'the springs l and 5'will be moii to mentari'ly closed just'before the digit. The springs 2 and3 and thesprings 4 and 5 are therefore similar to push "buttons operated just before sending a digit to switch to desired setof wipers except that they are antomatically controlled without the knowledge 'of' the calling subscriber; These springs 2 and 3 and 4 nd 5 may be controlled in any desired mechanical manner if desired instead of by the finger of the calling party. It will "be seen therefore that if the letter or any-"of the sec-ondrow holes are dialed the connection Wlllbfi extended by the selectors or connectors through their second set 5 of wipers to some contact of the second banks nd if the letter L or any of itsseries are/dialed; the call will extend through the upper Wipers and through con- JI ha've'show'n a'trunk line leadingfrom 7 hasaiccess to one hundred or more of such each of the threerbanks of the 'selector D,'it being understood that each set of wipers tru'nl'r-lines and that the trunks from ea'ch bank may lead to separate exchanges" or simply to other groups of connectors; 'T'he trunk line leading from the contact'of the lower -ban ks is shown as leading to thezcon nector switch H (Fig- 2) which has access 7 j tothe subscribers of'one 300 group.

'-: The connector H is of standard twowire type except that certain relays have been added as in the selector which are'controlled I by the springs 2; 3 and 4,501? myspecia-l calling device to switch the line circuits to: eitherof the three sets of wipers shown:

This connector is provided with an --elonsets of contact banks of one hundredlines eachso that the connector may pick out a called subscribers line in either of the groups or of 300 lines; I i

I Will now describe theoperation of as system in detail, reference being had' to the drawings. When a subscriberiat substation A desiresto call a subscriber w'hose line is connected to the second contact in the sec-.

0nd level of the lower bank of the connector i (for instance) then the digit'dialed Will be I 222 as is usualto thenow' existing systems.

In this case the operation fo-f: the'switches gated shaft as is :the selector and with three j as it will not be changed andfthecall will be set up in a well known manner of which will give a general vdescription only,- 'Wh'enthe" subscriber A V removes his receiver "the ;line

circuit "is closed to "energize "the line relay 6 oi: the line switch 7G,, Relays,'upon ener- V gizing, closes a seriesfeircuitfora-the switchf ing relay 7 and "the ;ro ta:ry magnet "8 ;'in ff series. In passing loverbusytrunk lines relay :7 is short circuite d; "groundnut-he private wiper which 'connects-"said?ground I:

direct to rotary magnet :8 through springs 9 and 10. VVhen'an' idle trunk is reached o line circuit causesthe line relay 12 of selector D to energlze in series W1th substation line 7 A and relays 18 and 14. Relay 13 is a marginal relay but energizes in this circuit to open its springs While relay 14 which is difierential does" not energize 5 as its Windings oppose each'other'. -Now, as the first digit 2 is dialedtheiline circuit is opened twice to cause relay 12 to send two impulses I to the verticalmagnet 15 while holding the release relay 16 energized Relay 17 isheld energized during-this digit as fit isf'inj series with vertical magnet-15.Although mar; ginal relay 18, also responds tothis series *of impulses its energization h'as no efi'ect as its control circuit-to relay 30 is opened at ,the first vertical step b y o fi' normal springs 40. Relay 17 vhile energized closes afcircuitj'for the-rotary interrupter relay 18 which in turn prepares a circuit at springs 19'for the rotary magnet 20. After the impulses to the. vertical magnet ceasef re-lay 17V falls back and completes the circuit J'of the a rotary magnet" which energizes I to step a the 2 connections of the line relay 34 to the line circuit, whereby battery is reversed to the calling line for any desired purpose I such as metering. The two subscribers may now converse over the heavy conductors shown,

including the wipers .21 and 22 of selector l) and wipers and 4,2 of connector After the conversation is completed the connection is released in the usual manner by the hangingup of the receiver at the calling station which operation opens the circuit of the line relay 3-4 which in turn opens i the trunk release holding circuits of relays a 'Letus assume nowf'that the calling subscriber desires to setup a callto the subscriber whose line is located on the second contactfof the second level of the second" lows: The removal of the receiver causes the line switch C to operate to select an idle trunk which, we will again assume, leads to the selector D. The calling device is then operated for the digit 2 as before to select an idle connector in the second group or level, such as H. The next digit being B the subscriber inserts a finger into the hole sodesignated, androtatesit around to the finger stop. Just before the finger meets the stop, the springs 2 and 3 are operated to ground one side of the line circuit as shown at substation A. 7 As the linecircuit is now connected in series with relays 34, 35 and 36 of the connector, this grounding of one side of the line causes one winding of relays 34; and 36 to be short c cuitedthrough ground. This has no effect on relay 34,.but relay 36,

being differential, will now operate to I close the springs 81 in the circuit of switching relay 50. which relav energizesand locks itself energized to ground on springs of relay 37. As soon as the finger is re moved from the dial thesprings 2 and 3 are again opened and the dlal returns to dehver two impulses, as when 2 is dialed, to the line relayB l. The switch is therefore operated two steps in a vertical direction by this digit, and when the next digit being 2 the rotary. magnet 1s controlled by relay 3% in the same'manner as when calling 222,to stepthe increasesthe capacity a its 300 trunk capacity,

48ers in the previous call, thebusy relay 'or wiper cut on relay is controlled over the private wiper .46, which is associated with the second bank, through spring 62 and its front contact and, spring63 and its back .contact. It will beseen-therefore that only the line in the second bank will be tested and 7' if idle,.. connection will be extended thereto over the wipers 4A and 455 which are the same'manner as when calling 222 except that just before sending the first digit to the connector the springs 4: and are opere ated by the subscriber to include the high resistance X at the substation in series with the line circuit. In this case the marginal relay will be allowed to fall back instead of pulling up with relay 36 as before, and a circuit will be closed for the switching relay 51 through the springs 82 and off normal springs 83. It will be seen the only time relays and 51 may be energized is before the switch steps off normal, sothat no false switching may occur due to the fact that off normal springs 83 and 84' open on the first vertical step. Relay 5l now energizes, locks itself to ground at springs of relay 37, and switches the line circuit to the upper set of wipers i7, 48 and 19. The switch will again beoperated to step all wipers to the second contact in the second level of their banks except that the testing will be controlled over private wiper 49 and the connection will be completed to the line in the upper bank, if idle, over wipers 4 7 and 4:8. I

- have now described the different ways that a subscriber may set up a call to any other subscriber whose line is located in that p-art of the exchange which isaccessible to switches of the lowerbank of the selector D." it will be understood that other selectors, similar to D, may be inserted be. fore the connector Hwvithout departing from the spirit of my invention, and that each selector or'group of selectors added, great deal, owing-to Thetrunk lines leading from the second and upper banks ofthe selector D may lead to any desired points, either tolongdist-ance boards, other exchanges, or simply'to other groups of connectors similar to H, That is, in th last instance, assuming the trunk lines ineach bank lead to connectors such as that shown at H, then the selector'D has accesson ,each of its ten'levels to'three ps f en e w sw mh s ea h r up' nil ct rsTh ingi ce s #9 30:0, lin

Therefore the system as illustrated?woifld 'QQOOQ lilies vithdut "fur-[1f he BB2. 'Now when thfi first! digit .I is

@ 1 1 a s, he?d ff re ti lay, 1w

line eircuitj-tefthe secend s tbf iper-521i,

' 25 and 26." Therefore as shon a s'thejswit'ch i is/tarts to rotate; only that-wiper 26, j hin'g efieetive; anfidle tr'u k lii e in the's'eeond "level" of the second hank williihe" sel e fetled I aihd the Cdhnebtioh will be 'extendfedftd a connectol "in that group. Thefseicfond digit B 110W jcontifols the selected connector in" the sam 'mannei' as, the switeh Hr (Fig; "2) was coiit 'ipll'ed when 2B2iwas called, and

' level ofthe'seeondebtp k ofthat conneeto r Q lectedg' h r A It will be s eei theref oife that thelsy sterin is 'divided into three la g'e' group s 11's -11lusv trated that is, afte seizing the selectei' D will beseizedf m, if the ealling sub ser ber' deslresto neetcr fswitchesxin 'some 'level of the third bzink of-Selector D ,'thenthe digit wybuid be for eXa InpIeMBQ, and the relay 13 Will be operit'ed as was relay of the Connector H V Qto rcontrel relay-'30 oflthe se1e'ct01 D to Switch th line circuit to the lipperwipe 's.

ln this case the-l fe ifer e a"trunk-line leeated' M i i the upper bai hdfthe se leetppDjwili be h s b cr r m y dime-hi 93- o t e paths without my eohseioug aetio'h'enghis 1 part. That is if the'fii st digit is anyfixite 1 'Ifthe first digitidialed is'any Ofthe letters'l'; 1' A t6 K h h al im y waded-t ny "one of th 00 c ne s in, he secb l'b n f ob the second path; While if the first digit th pall' m gtybe xt nded to' any bpebf one hundred CQnnectofstas is now the pfic-tice.

. i sf any of the letter si'Lit oWV then the cell -Y m y be l dedrt thf 'thir pa o u iv si o er a y onld the. hundr d e i-1 Iie'etors inthe qthiid bank'lof the switch.., Further than this, after thesubseriber has letters it a I fhel'es "of one row for another of said W pers,

it through the j medium 1 t one 7 i c'ontrpllihg means, {the switch is oj pel ated to egte d a select del l d i g' PL first digit ealle wil'l always goes to" the third the I .Of t led nilihberJwill zihya ysihe' oiiej fi the-IetterSL e W iii the euftei e lcel tr operating and cOIistnietingf-eni iaQiitO i .9 telephone- SySt QI n 'SO that" the: capaiielty 0'f]l.fit such" a exchange is; greatly) I increased and)" t uq th zp c i namethbdbf.d s-

Qmfin m d ,fub iibe i mb 3w be ery-e sy m i end. W111 e mor njel -nemr" si bsc ihe h b e tsf i fe re 11f m' vl ive it qni I "will point but in th appended elztiihs I a consider to be new andde si1 e"tothax e pro tecfedi by L rgPatent.

' What I' e1aim'i -5;

1 '1 el p o syst m; au om ti sw m p ur ty 1 5 w pe'rsif r sai witch; tr k lines t Q lli g de i i fh l 3'1 9 impulse springs for cdntrolling. said Swit h i o c n t'seid' wi xs simu eeusly" 11 d fferent tri nlghhesga dial fOiVSald: dev 'cda c dntrdl sziidimpulse, 's priiig's ii l similar, I

ma'nnr 7 switching {device to iirb ld y said calling'. device wheiif conti'elle d" the "S t hin F TQm PZn t v & Switching; de .v i 'ew'ntl 'd b eii-T il g 'f e hen ei e by t h'oles f e d ih im 's t i g q ano tqfse' d'w p t i i f .11. ii te e l i n .SYfifleQJ-ezlqwitbmati i i h. h in p itality' of W nett e i device foi m'mn n thejppemtig of switch,

Sc ribeif' are greatly freduhedl "A1 50 i tf' is I Having. full y aseeftaii ie'd I l io rneans thefconnection is extended over a third T connection over one wiper, means whereby when the sw tch is-operated by means'of another controlling Ineansoi' the dial, a 'con o nection isjextendedover another'wiper, and- "means whereby when the switch s operated by means Tor another cf said controlling wiper.

a, telephone system; an automatic switch,fa plur-al ity of groupsof trunk lines accessible to said switch, afcalling device 1 associated vvithfsaid switch, .a dial having a pliirality otrows of finger holes associated with said calling devicejfori controlling the same tooperat'e's'aid switch, oneofsaid rows being deswnated by "numbers" and others (of said rows being designated by letters, means controlled y the fn'umbered row for operating said switch to 'extend a connection to a trunk line 111 one group only,

' and means controlled by each ofthe lettered -rows.,for extending a connection to other groups;

Lin a telephone system, an 'auto n'atic Tswitchy'a pair of wipers for said switch mounted'on a oo'mmon'shaft, a call1ng;de-

vice, a row of numbered fingenhole's for controlling said calling fdeyice pa row of lettered finger holes for controlling said de-' vice, means controlled by. saidcalnng dev ce when operated through the medium of said rows for operating said switch to extend a connection over either wiper, the wiper over which the connection'is extended depending upon the rownsed.

5. In a telephone system; an automatic switch, a plurallty of groups of trunk lines accessible thereto, pa callln'gi'device, a plu- ,.ra1-ity of controlling means forsaiddevice,

each adapted to control said calling'vdevice 'tooperate said switch through asirnilar movement, means associated with, one of sa d controlling means for directing the ex- .vt'en'ded connection to trunk line in a first group when-the switch isoperatedthrough the medium ofv said one ineansy means BSSQCIELtGCl with another controlllng. means ,for directing the connection; to a trunk line a third group of lines.

'in a second group only andmeans associated with anotherof said controlling means for directingthe connection to a' trunk line in 6; Infa telephone system, an automatic switch, ,a line leadin to said switch a plurality of wipersassociated, with said switch, a calllng device associated with said linej for operating said switch; a 'ro wiof numbered finger holes for controlling said device, a plurality cfrows of lettered finger holes for controlling said device, means whereby whenfthef-device is. controlled thropgh the;;med1nm of the nnmbered'row' tgloperatethe sw tch v the line is connectedto one of said wipers, and means associated with said lettered rows. for connetin g the line to others ofsald wip I 7. Iii-a telephonesystem, avnf' aiitoinatic i switch having a definite inovementja pln rality 01" groups of trunk lines accessible to said switch at any point in its movement a Icallingfdevice, arow ofnumberedholesjand v f a row of letterediholes eachfi'or'controlling]- the device to step the switchto anypoint in its movement, and means dependent upon the row used for determining, the group into which theconnecti'on is to heez 'tended 8.7 In a telephone system, an automatic switch having a plurality of wipe-rsfalline leading to said sw itch, a pln'r'alityof groups" of trunk lines accessible to said switch, a

ent onefof said wipers" when the device is controlled through 7 the mediuml of the associated dial. I jv 9,111 a telephone system; an} automatic switch having a definite movement, a line 1 leading to said switch, a plurality of Wipers associated with ,saidswitch, a calling device associated with said "line. a numbered and a lettered set of finger holes for; controlling said device to step said sWitchVt-oany point inits movement, and means dependent upon which set isiused forswitchingj'the line toa'predetermined one of said wipers. v In a telephone' system an" automatic swltch, a line leading to said SWi' JCl];il pluwipers being normally connected to said line 'a calling device for said lin'ega plurahty of rowsof controlling holesfor said ,rality of'wipers for said switch, one of said 7 device for operatingthesa ne as control the operation of said switch means coi'itrolled v when one row is used to operate the dial for switching the line from the norinally comi nected wiper'to another, and nieansfco'n- ,trol lcd when another row is used tooperate 7 Y the switch for switching the line to stilllan-h I other of said" wipers.

Ina telephone system. an automatic swltch, a line leading to said switch, aphirality or" Wipers for said switch for extend connections from said line,. one of said winers normally connected to said linea calling device "for said; line tor operating] said switch, annmbered; and a letteredjrow of l'ingerholes for, controlling saiddevi'ce, I

means controlled-by the numbered holes when used to operate the device for causing the operation o-f- .the switch :tofl e gtend con- 1 nection only over. the hormallyfconnected wiper, and means Controlledjby the lette ed 7 holes foricaiisin'g theoper'ationofthesysritch to eXtendconnection'si over, another 1 said ipers only.

7 divided, into groups,a callingiolence, a m n bored row? of holes and 'a-plnralityio frows :pending upon the row used. a

12. I a; a phalt systeni, 5511' [ar mas switch-trunk lines accessibleto'sa d; stvitch oft-lettered holes, each row, having means for yeontrolling" said-deyiee -to operate said switch ,to [connect ithaz inkr-line in; each 13, in a telephone system; anantornatic i s-Witch,'a line leading to said switch, 'ajplnrali-tj oflwipers' for said switch, a; single;

operating magnet for moving an oi said Wipers simultaneously, aline relay. for oper-' ating. said switch,.a calling-device.fhaving a plurality] of; controllingsets jofzfinger Z atesa-idiswitch toextend a 'connection overf a predetermined one of sa d ,:w pers,' the 1 25 16'.;In a telephone system, an"autoniatio l holesfor controlling said line-relay to oper- Wipenused dependingnponthe set of holes used tocontrolthe odevi'cey a; e

714L111 a. telephone system, anT-autom'atic 'fswiitch,fa line leading toisaid swi-tch'fa plurality; ofwipersforsaidfsWitch;.--a line re; for. controlling'said switch to extend 'a connection fromsaidline over. any of said wipers; a; pairof sv'vitchiii'g devices for con-' necting said line-to alternate wipersanalling device associated with? said: line for operating-said?switch; a pair of controlling devices I for said dials-land means for; automatically operating either-0f :said control 7 ling devices during the operation of said:

calling deyice to switch" the-line to any wiper, i

' In "it devieefoncontrolling either of said relays to switch to any odesired'wip erl switch, aline leading to saidswitch; a plu .rality; ofiwipers for said switch, a c'a'lling" device for operating said switch .tofextend a connection over any of .said ipers, relays" 7 for switching said line zto 'any [OfSELld ipers, means controlled by the operation of'said device when controlledfin one manner to'iground one side of'thedinetoswitch said line to one 'ozf said Wipers through the 7 medium of one of said relays; and means controlled By the device-When controlled in another manner for includingin resistance said line to switchythefline to another jsaid relays f v v i 7 1?."In;a telephone';system';ai -automatic I switch, =a line leading to: sha eware, alwiper. l for said 7 switch normally connected to. said 1 1i t er Wip r fOEi Saidfs'Witch,fa marginal v wit to operate said switch to connect 7 other of "said trunk 1ines,-: and a-nt'omatic may be operated inac'cordanceiwith acalled- I telephone system, :an automatic v i switch havinga plurality ofwipergaTline, leading to saidswitch,;a callingdevice hav-' 7 ingineans for: controlling said .line'to;oper.-. I ate said switch,ia dillerential relay 'for 'con nee-ting theline -to"gonelofr said Wipers, a

marginal relay for connecting'the lineto an other-of said Wipers,"and automatiomeans' controlled in the operationof said cal-lin a third-groupgonlyz I ,v In a telephone s'yste n, subscribers? 1 7 li nesla'rranged; in groups, a plurality of au} I 'tomatic switches; av calling ,de'vice forTcon-Z trolling-the operation of any of said switches'l to'e'xtenda' connection fromga;calling line ii rOW designated numbers and other rows and numbers, means assoc-iatedg iivith the dial;-

relay for iswitching said line to one-of said,

other ipers, a dififerentialrelay for sivitch- 2? ng the; line to ano'therofiSaid-other Wipers 1f 1 acallingfdeyice for c'ontrolling ithe operaj tion} ofsaidfswitch, andwineans controlled bysaid; callingidev'ice for energizing either V of zsaid relays to switch the line to I a; predefj ,term'ine'd one ofsaid'. ipers-Q11 18. 'In" a telephonesystem, an autolnatic impulse springs for controlling said line 011! any of sai'di trunk lines;*-another pairof "springs;associatedlwith said line-adap ed", 1- 7 tov limit the fconnection from the switch-toil certain of saidtrunk linea -a] third pair J 1 springsassociatedwith said line forlimitingj' 56 the connections 'i'rom the; switch to certain means individual .to said-calling; device 'forcontrolling said impulseqsp rings and either j of said other pair oi": springs at will. g5

flIQJInfatelephone ;.syste n1,,subscribers? A v lines arranged in-groups;?aiplurality of an -j f 4' i tomaticfsw'itches, a calling i'device for con- Q ftrolling' the operation of any of saids witches.

to extend axc-onnection from-a calling line to 66 a line-in anyofsaidgronps a dialforcom; a

trolling; the operation :of said deyice; having finger holes .in' a; plurality-ofroWs,; one row '1 I designated by; numbers: andother rlows desi ignated by letterafivherebj the [said-{dial row only,'thec cal l maybe extended to a line 1' i in-asecond group only;fend-ifthe dial is operated by 'means oi another .lettered'r:ow"-" 1155 only, the call may. hefe xten ded to a in tea line: in any 'of'saidgroup's, adial for controlling the operationzof said device, hays ingf finger h oles in a plurality of ros',one

designated by; letters, whereby the, said dial? maybeiOPQrated-inaccordance itha called; I

subscribersc number: which consists of letters whereby-fifths: dialiis operated by means. of

Wiper through thei 'n ediiin i of another al 1 '1"" switch, a=;plurali ty oftrunk lines accessible 1 tosa-id'sv'vitch, agline leading; to said witch, 3'

Slit]:

. thenumheredrow oftholes onl ythe call may pass only to a line in one group,'if the dial operated by means of'one lettered oW 'iy the callmay'extend to ailine'in a second group only, and if the dial isoperated by' means or another lettered row onlyythecall' maybe extendedonly to= a line in a third her of other groups, the group intowhich the call may extend depending upon-theorder in whichsaid letters and figures. are dialed. 1 I v 21. In afltelephone system, anautomatie switch, threesets of wipers for said switch,

' calling device for controlling said switch inaccord ance with the 'dig itsfof 21- called number, and means controlled; by a single "operation"of saidfcalling device for first ,electingone' of said sets ofwipers and for I then moving said wipers to a desired posilines, a calling deviee'for contro in switch, said device hav ng a plurality of "tion, 1 I r 22. In a telephone system, an automatic switch, a plurality of wipers for said switch, a calling device a-SSOQ121tGCl V/ltl1 tl19 switch 'a'nchhaving two rows of finger holes for V; ffo'r the dial; said holes so "arranged tha any set maybe used to operate the callns dSVlCellO send impulses n accordance another setforswitching the'line to another alternate *set of said wipers when that set is used to send a digit. I: I

Qiiln a telephone fsystern, an automatic switch, tiree sets ofwipersfor the switch each having access'to a different group of said rows of controlling finger holes, means controlled by a single operation of the calling 7 device whencontrolled by one of sa d sets of holes for first electing a set of wipers and then m'ovi-n'g said wipers to asub group in its particular group, and means controlled hy'ra' single operation'ofithe dial when'controlled by another ofthesets for electingranatheist of wipers and then moving them to the'sulogrQLD; .1. y

255111 a telephonesystein, an automatic v group,;ancl means wherebjrif the-dial is op Y er ed in accordance with a called number consisting of-hoth letters-and figures the call may be extended to a linein one of a num-' connectionsa pluralitv of sets of finger with a digit of the called number, means associated with" one of said sets and operajtive when that set is used to o'perate'the device for switching said line to one alternate set of said wipers, and means associated with switch, a pair of wipers for-said switch; trunk lines associated with; each wiper, a

device, impulse springs for saicl de j vice, a finger'hoI'e Jdia'l for variably {oentrol ling said impulse springs 'tooperate said switch having apair oi concentricirows of; finger-holes, the'corresp'ondmg holes o f each row adapted to operate said impulse springs a like number ottimes,meansiwherehy whenthe' 7 switch is controlledthrough the mediumjof one row'of holes, a trunk 'willibe connected with ever one of said wipers; and if the switch is operated through the medlumjof the other row of holes a trunk .vill"he connected with over-the other wipelx'r 26; In a telephone system, a series of automatic switches 'eachhaving a pair of Wi ers, a calling device,- impulse springs controlled by said calling device, a'finger hole dial for s'aid'de'vic'e having a pairofrowsof linger holes, the corresponding holes of said rows adapted to control saidimpulsesprings-to operatefsaid automatic switch in a like mana ner, and means depending upon the row 1n which the finger hole used-is locate'd for determmingover which wiper a connect on .is extended; j H '27 In telephone system -an:automatie"- switch, a pair of wipers for said switch each Y having'a plurality of trunklines accessible thereto to which it is adapted "to, extend a connection, a calling device! 'terncontrolling the operation of saidsWitch,-a dialilorcon trolling: said calling device, a pair of rows of finger holes'for said dial, each row corre;

spending to one ofsa-id wipers, andcircuit 'arran ements whereby when the'dial is op' slated to control, said switch through the medium-of one. of said rows a connection willvhe extended only to atrunk line accessibleto oneiwiper and when the other row E's-used a connectlon Will be extended only to trunk accessible to the other wiper.

28. In telephone system,-a-.calling device ncluding a pair of impulse springs, a cirj cuit fort impulse springsfan automatic switch controlled over said circuit, trun-k lines-accessible to said switch divided into groups, a finger 'hole dial for .saidcdevic'e having a pair ofconcentric: rows of finger 7 holes, said holes arrangedin pairs sothat the -h0les ,ofeach pair whenausedito operate the impulse springs have a;s1m1lar etl'ectupon said springs, ianother ofsprings controlled in cemrnen-by the use of any-finger hole in-one row, and means whereby when one 0? sald rows ofholes'rare -nsedthe automatic sw tch isoperated to select atrunk' line of one' group, and when the other row ot'holes are used the automatic swltch 1s operated to select a trunk line-.111 another group throu h the medium of said other, air of springs, the group in which a trunk line is to be selected being predetermined before the switch is operated. r

29. In a telephone system, a series of auto- ,matic selectorswitches, an automatic connector switch, said selectors and said con-l nector operated successively to extend a connection to a called line, a pair of Wipers for eaclfswitclneach having access to a different trolled by one of said rows of holes to switch the connection from one wiper to another, "whereby when the device is' operated by means of one of said rows the connection is extended over one wiper of each switch, and when the dial is operated by means of the other row, the connection is extended over the other Wiper of'eaeh switch.

30. In a'telephone system, anlautomatic switch having a definite motion in two olanes a air of wi ers'for said switch a calling device, a pair of groups of finger holes for said device, impulse springs controlled in the same manner by the corresponding'holes in each group to operate said 7 switch, a device controlledby'the calling deviceonly when one of said groups of holes are used to switcha'connection from one wiper to the other, whereby when said impulse springs. are operated by said' devioe through the medium of an hole in one: row

the connection is extende over one wiper and over the other wiper when any hole'in I the other row. is used.

31. In a telephone system, an automatic switch, trunk lines accessible to said switch" dividedinto groups, means in the switch for connecting with a trunk line in each group simultaneously, a callingdevice for controlling the operation of sand switch, alternate controlling means each for opera-ting'said device throu hout 1ts entire range, and

' 45 7 means is used'for rendering the connection means dependent upon Which" controlling to only one of said trunk lines eflective.

32. In a telephone system, an automatic switch, a line leading to'said switch, a plurality of wipers assoc'iatedwith said switch,

a calling device assooiatedwith said line for operating said'switch, a pl'l'irality of rows offinger holes for controlling said device, the fingerholes of one of said rows having a series of symbols or characters and the fihger holesv of another row having a seriesof sylnbols'or characters unlike those of any other' of said rows, meanswhereby when the w device is controlled through the medium of aesymbol or character of onerow to operate the switch, the line isconnected f to one of said wipers, and means associated for connecting Wipers. J Signed by me at Chicago, Illinois, this 11th dayof May, 1918. i

;,- WILLIAM WALTE WEN. I, h

with a symbol or character of another row I the" line" to another of said 

